GOD's word: Why I think Good will triumph over Evil?

Mother's love for her child.

God created this Multiverse with Five Elements and Intelligent Life with Souls.

Did Earth ever stop carrying us? Did Sun ever stop rising? Did Earth ever stop rotation or revolution around Sun? No, right!!!
Did Fire ever stop burning? No, right!!!
Did Wind/Air ever stop carrying fragrance? No, right!!!
Did Water ever stop satisfying our thirst? No, right!!!
Did Sky/Space ever fell on us? No, right!!!

This is the cosmic balance of God's Creation. The moment the cosmic balance goes away due to Evil, The God's Creation will perish. That is why God, who loves His Creation, ensures Good triumphs over Evil always.